Alarm clock



FIG. 1 is a first perspective view of an alarm clock showing my design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof,

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines are included for the purpose of illustrating portions of the alarm clock and form no part of the claimed design. 

CLAIM The ornamental design for an alarm clock, as shown and described. 